Driving pulse width controlling circuit for a transducer of an e

Details Driving pulse width controlling circuit for a transducer of an e Driving pulse width controlling circuit for a transducer of an e

1977-01-28

1978-09-19

Jackmon, Edith S.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

58 23BA, 318317, G04C 300, H02P 700

Patent

active

041143647

ABSTRACT:
In an analogue electronic timepiece having a transducer comprising a rotor, a stator and a driving coil, means is provided for supplying to the driving coil, periodic pulses of a selected width to drive the rotor. The width of the pulses is automatically controlled according to the load of the transducer so as to reduce power consumption and accordingly to increase the useful life of the battery by which power is supplied.

REFERENCES:
patent: 3812670 (1974-05-01), Nikaido et al.
patent: 3855781 (1974-12-01), Chihara et al.
patent: 3892066 (1974-02-01), Watkins
patent: 3969642 (1976-07-01), Yoshino
patent: 3971204 (1976-07-01), Kawaguchi et al.
patent: 3992868 (1976-11-01), Tamaku et al.
patent: 4001808 (1977-01-01), Ebihara et al.
patent: 4011713 (1977-03-01), Sauthier et al.

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